C#•2y ago

❔ Why can i not override a Method from a class that extend a Interface

public interface IRegistry {
    
    public static readonly List<IRegistry> RegistryTypes = new();

    public virtual void Initialize(ContentManager content) {
        
    }

    public virtual void FixedUpdate() {
        
    }

    public virtual void Draw() {
        
    }
}

public interface IRegistry {
    
    public static readonly List<IRegistry> RegistryTypes = new();

    public virtual void Initialize(ContentManager content) {
        
    }

    public virtual void FixedUpdate() {
        
    }

    public virtual void Draw() {
        
    }
}

public abstract class Registry : IRegistry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

public abstract class Registry : IRegistry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

Here i try to override the Method "Initialize" but it does not work, is there a way to override it?

public class ClientFontRegistry : Registry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

public class ClientFontRegistry : Registry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

87 Replies

Unknown User•2y ago

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MrScautHD•2y ago

i want it optional

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

to override

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

toolset?

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

    public virtual void Draw() {
        
    }

    public virtual void Draw() {
        
    }

dev told me its right to use it like that if i want it optional but yea i can remove the public

Unknown User•2y ago

Message Not Public

Pobiega•2y ago

If it's optional to provide it shouldn't be in the interface

Unknown User•2y ago

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MrScautHD•2y ago

what should i use then?

Unknown User•2y ago

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MrScautHD•2y ago

but it is a register system so i not need everytime Draw method but when i need it i can just override it and it get called

Unknown User•2y ago

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MrScautHD•2y ago

then i need to implement all methods what if i just need 1

Unknown User•2y ago

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333fred•2y ago

Here i try to override the Method "Initialize" but it does not work, is there a way to override it?

What does this mean?

MrScautHD•2y ago

but then i can not call it like:

        // INIT REGISTRY
        foreach (IRegistry registry in IRegistry.RegistryTypes) {
            registry.Initialize(this.Content);
        }

        // INIT REGISTRY
        foreach (IRegistry registry in IRegistry.RegistryTypes) {
            registry.Initialize(this.Content);
        }

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

^^ then would it not auto cast to the right type ... i need everytime to cast it

333fred•2y ago

What do you mean when you say it does not work?

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

Unknown User•2y ago

Message Not Public

333fred•2y ago

You said "it does not work"

MrScautHD•2y ago

not if it in a interface

333fred•2y ago

What do you mean by that Do you get an error? Do you not see the thing that you expected to be called called?

MrScautHD•2y ago

no i can not override the interface methods when i before use a class that extend from it

333fred•2y ago

What do you mean by that???????

MrScautHD•2y ago

what?

333fred•2y ago

When you say you can't override interface methods?

MrScautHD•2y ago

public class ClientFontRegistry : Registry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public override void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

public class ClientFontRegistry : Registry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public override void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

333fred•2y ago

Why do you say that? What observable output are you basing this on?

MrScautHD•2y ago

look c# does can not handle the interface method if i do ClientFontRegistry : Registry : IRegistry Registry does brake it...

333fred•2y ago

I am trying to help you out here, but just saying "it does not work" without actually saying what is not working is not helping me here

MrScautHD•2y ago

wtf

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

no error message it just not work

333fred•2y ago

Ok... then what is happening

MrScautHD•2y ago

it not allow me to override the methods from my interface

333fred•2y ago

I do not believe you that this code has no error messages 🙂

MrScautHD•2y ago

because i before use Registry to extend from it

MrScautHD•2y ago

Unknown User•2y ago

Message Not Public

333fred•2y ago

This is not the code I replied to

MrScautHD•2y ago

yea if i use override yes

MrScautHD•2y ago

Unknown User•2y ago

Message Not Public

333fred•2y ago

Alright. So, after pulling a bunch of teeth here, let me see if I have this right. Code that effectively looks like this:

using System;

IRegistry registry = new ClientFontRegistry();
registry.Initialize();

public interface IRegistry
{
    public virtual void Initialize()
    {
        Console.WriteLine("IRegistry");
    }
}

public abstract class Registry : IRegistry
{
}

public class ClientFontRegistry : Registry
{
    public void Initialize()
    {
        Console.WriteLine("ClientFontRegistry");
    }
}

using System;

IRegistry registry = new ClientFontRegistry();
registry.Initialize();

public interface IRegistry
{
    public virtual void Initialize()
    {
        Console.WriteLine("IRegistry");
    }
}

public abstract class Registry : IRegistry
{
}

public class ClientFontRegistry : Registry
{
    public void Initialize()
    {
        Console.WriteLine("ClientFontRegistry");
    }
}

You expected to print ClientFontRegistry, but actually printed IRegistry Is that correct?

MrScautHD•2y ago

yes i mean yea Registry does brake it

333fred•2y ago

Ok. Reimplement IRegistry on ClientFontRegistry What is happening here is that Registry needs to implement IRegistry, and IRegistry provides a default. So that's it. No more virtual dispatch occurs

MrScautHD•2y ago

yep now would it work but i wanna use the methods of Registry too ouf

333fred•2y ago

You could reabstract Initialize in Registry if you wanted as well

MrScautHD•2y ago

yea...

333fred•2y ago

And force inheritors of Registry to provide a non-default implementation

MrScautHD•2y ago

maybe is a static method then better from Registry or wait is it possible to extend from 2 things? like 1 interface

333fred•2y ago

Extend? No

MrScautHD•2y ago

and one normal class like java 😄

333fred•2y ago

You can implement multiple interfaces But you can only have 1 base class

MrScautHD•2y ago

public class ClientFontRegistry : Registry, IRegistry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public override void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

public class ClientFontRegistry : Registry, IRegistry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    
    public override void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

so that works thxx you helped me

333fred•2y ago

It does, but it also possibly doesn't

MrScautHD•2y ago

rider tells me that it get called so im sure it works let me try it yepp thxxx for our help

333fred•2y ago

If Registry overrode functionality, you'll lose it

MrScautHD•2y ago

public class Registry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

public class Registry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

thats why i not call it anymore from it

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

that would work too but i think that way i has now is better

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

But thx for our help!

Unknown User•2y ago

Message Not Public

MrScautHD•2y ago

public interface IRegistry {
    
    public static readonly List<IRegistry> RegistryTypes = new();

    virtual void Initialize(ContentManager content) {
        
    }

    virtual void FixedUpdate() {
        
    }

    virtual void Draw() {
        
    }
}

public interface IRegistry {
    
    public static readonly List<IRegistry> RegistryTypes = new();

    virtual void Initialize(ContentManager content) {
        
    }

    virtual void FixedUpdate() {
        
    }

    virtual void Draw() {
        
    }
}

public class Registry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

public class Registry {

    protected T Register<T, B>(string name, Dictionary<string, B> registryList, T type) where T : B {
        registryList.Add(name, type);
        
        return type;
    }
    
    protected T RegisterLoad<T>(string name, Dictionary<string, T> registryList, ContentManager content, string path) {
        T type = content.Load<T>(path);
        registryList.Add(name, type);

        return type;
    }
}

public class ClientFontRegistry : Registry, IRegistry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    public void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

public class ClientFontRegistry : Registry, IRegistry {
    
    // REGISTRY LIST
    public static readonly Dictionary<string, Font> Fonts = new();

    // REGISTRIES
    public static Font Fontoe { get; private set; }
    
    public void Initialize(ContentManager content) {
        Fontoe = this.RegisterLoad("fontoe", Fonts, content, "font/fontoe.ttf");
    }
}

im more fan of this, it looks way cleaner

Unknown User•2y ago

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MrScautHD•2y ago

oh ok

Unknown User•2y ago

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333fred•2y ago

Unknown User•2y ago

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333fred•2y ago

$tias

MODiX•2y ago

https://images-ext-1.discordapp.net/external/CO2vsU2aXbRqYy1RdewOYnkBq1nGFBjdbjlNgjvG67A/https/media.discordapp.net/attachments/364492811489509376/964064233035816990/unknown.png?width=543&height=257

Unknown User•2y ago

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MODiX•2y ago

Orannis#3333

You can implement multiple interfaces

Quoted by

<@!689473681302224947> from #Why can i not override a Method from a class that extend a Interface (click here)

React with ❌ to remove this embed.

Unknown User•2y ago

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MrScautHD•2y ago

        // INIT REGISTRY
        foreach (IRegistry registry in IRegistry.RegistryTypes) {
            registry.Initialize(this.Content);
        }

        // INIT REGISTRY
        foreach (IRegistry registry in IRegistry.RegistryTypes) {
            registry.Initialize(this.Content);
        }

i call it like that... that would just ignore this methods because

public static readonly List<IRegistry> RegistryTypes = new();

public static readonly List<IRegistry> RegistryTypes = new();

i get the right type but c# still use the default classes

Thinker•2y ago

Why does Registry implement IRegistry? I think what is happening is that ClientFontRegistry inherits from Registry, Registry implements IRegistry, so when you try to implement the methods from IRegistry on FontClientRegistry then it just ignores those since the interface is already implemented in the base class.

Florian Voß•2y ago

I'm seeing a bit of a violation here against the interface seggregation principle. Do not depend on interfaces you don't need. Your have two types that each use this interface but none of them fully uses it. What you've done is essentially you have created an interface which should partially be implemented by Registry and partially implemented by ClientFontRegistry. Just make two smaller interfaces having one get implemented by Registry and one get implemented by ClientFontRegistry.

333fred•2y ago

Remember to $close when the question has been answered 🙂

MODiX•2y ago

Use the /close command to mark a forum thread as answered

Accord•17mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Why can i not override a Method from a class that extend a Interface